<?php

namespace application\modules\main\components;

use application\core\utils\Convert;
use application\core\utils\Image;
use application\modules\main\model\Setting as SettingModel;
use CJSON;

/**
 * UEditor编辑器通用上传类
 */
class EditorUploader {

    private $fileField;            //文件域名
    private $file;                 //文件上传对象
    private $config;               //配置信息
    private $oriName;              //原始文件名
    private $fileName;             //新文件名
    private $fullName;             //完整文件名,即从当前配置目录开始的URL
    private $fileSize;             //文件大小
    private $fileType;             //文件类型
    private $stateInfo;            //上传状态信息,
    private $stateMap = array( //上传状态映射表，国际化用户需考虑此处数据的国际化
        "SUCCESS", //上传成功标记，在UEditor中内不可改变，否则flash判断会出错
        "文件大小超出 upload_max_filesize 限制",
        "文件大小超出 MAX_FILE_SIZE 限制",
        "文件未被完整上传",
        "没有文件被上传",
        "上传文件为空",
        "POST" => "文件大小超出 post_max_size 限制",
        "SIZE" => "文件大小超出网站限制",
        "TYPE" => "不允许的文件类型",
        "DIR" => "目录创建失败",
        "IO" => "输入输出错误",
        "UNKNOWN" => "未知错误",
        "MOVE" => "文件保存时出错"
    );

    /**
     * 构造函数
     * @param string $fileField 表单名称
     * @param array $config  配置项
     * @param bool $base64  是否解析base64编码，可省略。若开启，则$fileField代表的是base64编码的字符串表单名
     */
    public function __construct( $fileField, $config, $base64 = false ) {
        $this->fileField = $fileField;
        $this->config = $config;
        $this->stateInfo = $this->stateMap[0];
        $this->upFile( $base64 );
    }

    /**
     * 上传文件的主处理方法
     * @param $base64
     * @return mixed
     */
    private function upFile( $base64 ) {
        //处理base64上传
        if ( "base64" == $base64 ) {
            $content = $_POST[$this->fileField];
            $this->base64ToImage( $content );
            return;
        }

        //处理普通上传
        $file = $this->file = $_FILES[$this->fileField];
        if ( !$file ) {
            $this->stateInfo = $this->getStateInfo( 'POST' );
            return;
        }
        if ( $this->file['error'] ) {
            $this->stateInfo = $this->getStateInfo( $file['error'] );
            return;
        }
        if ( !is_uploaded_file( $file['tmp_name'] ) ) {
            $this->stateInfo = $this->getStateInfo( "UNKNOWN" );
            return;
        }

        $this->oriName = $file['name'];
        $this->fileSize = $file['size'];
        $this->fileType = $this->getFileExt();

        if ( !$this->checkSize() ) {
            $this->stateInfo = $this->getStateInfo( "SIZE" );
            return;
        }
        if ( !$this->checkType() ) {
            $this->stateInfo = $this->getStateInfo( "TYPE" );
            return;
        }
        $this->fullName = $this->getFolder() . '/' . $this->getName();
        $isSuccess = false;
        if ( $this->stateInfo == $this->stateMap[0] ) {
            if ( !defined( 'SAE_TMP_PATH' ) ) {
                if ( !move_uploaded_file( $file["tmp_name"], $this->fullName ) ) {
                    $this->stateInfo = $this->getStateInfo( "MOVE" );
                } else {
                    $isSuccess = true;
                }
            } else {
                // SAE环境中
                $st = new \SaeStorage();
                $url = $st->upload( 'data', $this->fullName, $file["tmp_name"] );
                if ( !$url ) {
                    $this->stateInfo = $this->getStateInfo( "MOVE" );
                } else {
                    $this->fullName = $url;
                    $isSuccess = true;
                }
            }
            if ( true === $isSuccess ) {
                if ( $this->config['water'] ) {
                    $waterModule = CJSON::decode( SettingModel::model()->fetchSettingValueByKey( 'watermodule' ) );
                    if ( in_array( 'baidu', $waterModule ) ) {
                        $waterConfig = CJSON::decode( SettingModel::model()->fetchSettingValueByKey( 'waterconfig' ) );
                        if ( $waterConfig['watermarktype'] == 'text' ) {
                            $textConfig = $waterConfig['watermarktext'];
                            $size = ( $textConfig['size'] > 0 && $textConfig['size'] <= 48 ) ? $textConfig['size'] : 16; //文字水印大小限制在1-48
                            $fontPath = !empty( $textConfig['fontpath'] ) ? $textConfig['fontpath'] : 'msyh.ttf'; //字体默认是微软雅黑
                            $rgb = Convert::hexColorToRGB( $textConfig['color'] );
                            Image::waterMarkString( $textConfig['text'], $size, $this->fullName
                                    , $this->fullName, $waterConfig['watermarkposition'], $waterConfig['watermarkquality']
                                    , $rgb, $fontPath );
                        } else {
                            $pathinfo = pathinfo( $waterConfig['watermarkimg'] );
                            Image::water( $this->fullName, $pathinfo['dirname'] . '/' . $pathinfo['filename'] . '_water.' . $pathinfo['extension'], $this->fullName
                                    , $waterConfig['watermarkposition'], $waterConfig['watermarktrans']
                                    , $waterConfig['watermarkquality'] );
                        }
                    }
                }
            }
        }
    }

    /**
     * 处理base64编码的图片上传
     * @param $base64Data
     * @return mixed
     */
    private function base64ToImage( $base64Data ) {
        $img = base64_decode( $base64Data );
        $this->fileName = time() . rand( 1, 10000 ) . ".png";
        $this->fullName = $this->getFolder() . '/' . $this->fileName;
        if ( !file_put_contents( $this->fullName, $img ) ) {
            $this->stateInfo = $this->getStateInfo( "IO" );
            return;
        }
        $this->oriName = "";
        $this->fileSize = strlen( $img );
        $this->fileType = ".png";
    }

    /**
     * 获取当前上传成功文件的各项信息
     * @return array
     */
    public function getFileInfo() {
        return array(
            "originalName" => $this->oriName,
            "name" => $this->fileName,
            "url" => $this->fullName,
            "size" => $this->fileSize,
            "type" => $this->fileType,
            "state" => $this->stateInfo
        );
    }

    /**
     * 上传错误检查
     * @param $errCode
     * @return string
     */
    private function getStateInfo( $errCode ) {
        return !$this->stateMap[$errCode] ? $this->stateMap["UNKNOWN"] : $this->stateMap[$errCode];
    }

    /**
     * 重命名文件
     * @return string
     */
    private function getName() {
        return $this->fileName = time() . rand( 1, 10000 ) . $this->getFileExt();
    }

    /**
     * 文件类型检测
     * @return bool
     */
    private function checkType() {
        return in_array( $this->getFileExt(), $this->config["allowFiles"] );
    }

    /**
     * 文件大小检测
     * @return bool
     */
    private function checkSize() {
        return $this->fileSize <= ( $this->config["maxSize"] * 1024 );
    }

    /**
     * 获取文件扩展名
     * @return string
     */
    private function getFileExt() {
        return strtolower( strrchr( $this->file["name"], '.' ) );
    }

    /**
     * 按照日期自动创建存储文件夹
     * @return string
     */
    private function getFolder() {
        $pathStr = $this->config["savePath"];
        if ( strrchr( $pathStr, "/" ) != "/" ) {
            $pathStr .= "/";
        }
        $pathStr .= date( "Ymd" );
        if ( !defined( 'SAE_TMP_PATH' ) ) {
            if ( !file_exists( $pathStr ) ) {
                if ( !mkdir( $pathStr, 0777, true ) ) {
                    return false;
                }
            }
        }
        return $pathStr;
    }

}
